<template>
  <div class="wrap">
    <div class="nav_left" id="navLeft">
      <div class="nav_content">
        <span v-for="(item, index) in arr" :key="item.first_id" :class="{active: active === index}" @click="active = index">{{item.first_name}}</span>
      </div>
    </div>
    <div class="down">
      <i class="iconfont icon-xiajiantoubeifen gray"></i>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      active: 0,
      arr: [
        {
          first_id: '0',
          first_name: '热门'
        },
        {
          first_id: '621',
          first_name: '\u5496\u5561'
        },
        {
          first_id: '627',
          first_name: '\u996e\u98df'
        },
        {
          first_id: '279',
          first_name: '\u7537\u88c5'
        },
        {
          first_id: '294',
          first_name: '\u5973\u88c5'
        },
        {
          first_id: '122',
          first_name: '\u773c\u955c'
        },
        {
          first_id: '339',
          first_name: '\u5185\u8863\u914d\u9970'
        },
        {
          first_id: '391',
          first_name: '\u6bcd\u5a74'
        },
        {
          first_id: '35',
          first_name: '\u978b\u9774'
        },
        {
          first_id: '39',
          first_name: '\u8fd0\u52a8'
        },
        {
          first_id: '153',
          first_name: '\u7bb1\u5305'
        },
        {
          first_id: '119',
          first_name: '\u7f8e\u5986\u4e2a\u62a4'
        },
        {
          first_id: '355',
          first_name: '\u5bb6\u7eba'
        },
        {
          first_id: '51',
          first_name: '\u9910\u53a8'
        },
        {
          first_id: '334',
          first_name: '\u7535\u5668'
        },
        {
          first_id: '369',
          first_name: '\u5bb6\u88c5'
        },
        {
          first_id: '10',
          first_name: '\u5bb6\u5177'
        },
        {
          first_id: '223',
          first_name: '\u6570\u7801'
        },
        {
          first_id: '429',
          first_name: '\u6c7d\u914d'
        },
        {
          first_id: '546',
          first_name: '\u5065\u5eb7\u4fdd\u5065'
        },
        {
          first_id: '433',
          first_name: '\u5b9a\u5236'
        }
      ]
    }
  }

}
</script>

<style>
.wrap {
  width: 100%;
  display: flex;
  margin: 0.2rem 0 0 0;
  position: relative;
}

/*左侧的导航样式*/
.nav_left {
  width: 21.1875rem;
  overflow: scroll;
}

.nav_left::-webkit-scrollbar {
  display: none;
}

.nav_content {
  white-space: nowrap;
  padding: 0 0.7rem;
}

.nav_content span {
  display: inline-block;
  padding: 0.4rem 0.6rem;
  font-size: 0.875rem;
}

.nav_content .active {
  border-bottom: 2px solid #7f4395;
  color: #7f4395;
}

.nav_left,
.down {
  float: left;
}

/*右侧导航部分*/
.down {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gray {
  color: gray;
  display: inline-block;
  vertical-align: middle;
}
</style>
